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Horizons and Anisotropies of Ultra-High Energy Cosmic Rays

A. Olinto 1 D. Allard 2 E. Armengaud 3 A. Kravtsov
1 APC (UMR_7164) - AstroParticule et Cosmologie
2 APC - AHE - APC - Astrophysique des Hautes Energies
APC (UMR_7164) - AstroParticule et Cosmologie, Dipartimento di Astronomia, Universita degli Studi di Bologna
3 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
Abstract : We study the propagation of cosmic rays at the highest energies of different compositions and discuss the implications for anisotropy studies of future UHECR observatories. The evolution of the horizon of cosmic rays as a function of the energy is mass dependent: low and intermediate mass nuclei can only originate from very nearby sources above a few 10^19 eV and the composition above 4.10^19 eV should be mainly protons with a small iron fraction. We show the expected sky anisotropies between 10^19 and 10^20.5 eV for exposures from 10^4 to 10^6 km^2 sr yr.
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Conference papers
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http://hal.in2p3.fr/in2p3-00365771
Contributor : Simone Lantz <>
Submitted on : Wednesday, March 4, 2009 - 3:09:05 PM
Last modification on : Friday, October 30, 2020 - 12:04:03 PM

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  • HAL Id : in2p3-00365771, version 1

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IN2P3 | OBSPM | APC | CNRS | UNIV-PARIS7 | CEA | DSM-IRFU | IRFU-APC | USPC | CEA-DRF | UNIV-PARIS | UP-SCIENCES | PSL

Citation

A. Olinto, D. Allard, E. Armengaud, A. Kravtsov. Horizons and Anisotropies of Ultra-High Energy Cosmic Rays. 30th International Cosmic Ray Conference, Jul 2007, Merida, Mexico. pp.527-530. ⟨in2p3-00365771⟩

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